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Showing results for tags 'truss'.
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Very happy with it! Wish the sky were clear, but as we all know, when we buy astro equipment, it's cloudy! Argh! The telescope was collected from David Lukehurst at noon and then we travelled back to Cambridge. John Nichol primary mirror: 37mm thickness, Suprax. Hilux coated. Optics 1/8 PV wavefront 1/27 wave RMS. Strehl .95. Secondary mirror: 62mm MA. Here a few photos:
As some of you know, I postponed the purchase of a Dobson for a few good years. Now that things in life are a bit more stable, I am in the market for this Dobson. It will take a bit before I press the button, as I still need to understand a few things about dobsonians. I've been contemplating a classic truss 12"-12.5" f5.5-6 for a while, as this would offer me a trade-off among portability, focal length, power, DSO, planetary, no coma corrector, and standup observing. Mirror and mount are equally important to me. I haven't yet decided, but I'm leaning towards an Astrosystems or Teeter 12.5" f5.5-6. Yes, customs and shipping won't be cheap. It's a telescope to last though. Any thought is welcome of course. Piero
Given that assembling a skeleton tube dob in the field requires collimation checking, what models of say F7 to 8 upwards, 8 to 10 inches aperture are available, which would not exceed an OTA vertical height of 72inches/6 feet? I like Portaball scopes, do they come with shrouds, or can shrouds be bought separately for them?